Pub Date : 2017-09-01DOI: 10.1109/EMCT.2017.8090358
K. Üstün, G. Turhan‐Sayan
In this study, metamaterial absorber structures that operate in the mid-wave infrared (MWIR) region are presented. The advantage of the design stems from the high absorptance in the region of interest and the ease of fabrication. Fabrication stage is facilitated by large in-plane geometric dimensions of the metamaterial pattern and small thickness of the full absorber geometry.
{"title":"Wide bandwidth absorption in the MWIR region using a thin and simple metamaterial absorber","authors":"K. Üstün, G. Turhan‐Sayan","doi":"10.1109/EMCT.2017.8090358","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090358","url":null,"abstract":"In this study, metamaterial absorber structures that operate in the mid-wave infrared (MWIR) region are presented. The advantage of the design stems from the high absorptance in the region of interest and the ease of fabrication. Fabrication stage is facilitated by large in-plane geometric dimensions of the metamaterial pattern and small thickness of the full absorber geometry.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126276329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-09-01DOI: 10.1109/EMCT.2017.8090373
Ozan Icin, K. Yeğin
Evolution of modern communications and radar systems have steadily increased the demand on modelling the propagation effects with real world scenarios for various signal types. The main purpose of this research is to create a flexible, generic and realistic Radio Frequency (RF) environment simulator including both radar and communication signals. Software defined radio (SDR) platform has been utilized for generating the simulated signals at radio frequencies. Power and delay profiles, frequency selective fading, Doppler effect and noise have been calculated for multiple paths and generated via RF outputs of the SDR. RF outputs of the system is suitable for use in the tests of receivers like direction finding systems and LTE MIMO systems. Communication quality for various terrain profiles and fading scenarios has been experimentally investigated for several signal types using vector signal generators, vector signal analyzers, demodulation and communication analysis tools. This simulation platform can be used in Electromagnetic Compatibility tests of such systems as well.
{"title":"RF environment simulation on software defined radio platform","authors":"Ozan Icin, K. Yeğin","doi":"10.1109/EMCT.2017.8090373","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090373","url":null,"abstract":"Evolution of modern communications and radar systems have steadily increased the demand on modelling the propagation effects with real world scenarios for various signal types. The main purpose of this research is to create a flexible, generic and realistic Radio Frequency (RF) environment simulator including both radar and communication signals. Software defined radio (SDR) platform has been utilized for generating the simulated signals at radio frequencies. Power and delay profiles, frequency selective fading, Doppler effect and noise have been calculated for multiple paths and generated via RF outputs of the SDR. RF outputs of the system is suitable for use in the tests of receivers like direction finding systems and LTE MIMO systems. Communication quality for various terrain profiles and fading scenarios has been experimentally investigated for several signal types using vector signal generators, vector signal analyzers, demodulation and communication analysis tools. This simulation platform can be used in Electromagnetic Compatibility tests of such systems as well.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127738851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/EMCT.2017.8090368
Türker Dolapcı, Feza Mutlu, Ö. Ergül
We present design and computational analysis of log-periodic antennas that are fabricated by using low-cost inkjet printing technology. The designed antennas operate in the 1.5–2.5 GHz range and are suitable for diverse applications, including energy harvesting at WiFi and GSM bands. Suitable designs are fabricated by using silver-based inks in standard commercial printers. Despite the challenges in both design and fabrication processes, we demonstrate log-periodic antennas with desired operating properties at the target frequencies. Details of the design procedures, parametric analysis, as well as simulation and measurement results are presented.
{"title":"Design, simulation, and fabrication of broadband inkjet-printed log-periodic antennas","authors":"Türker Dolapcı, Feza Mutlu, Ö. Ergül","doi":"10.1109/EMCT.2017.8090368","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090368","url":null,"abstract":"We present design and computational analysis of log-periodic antennas that are fabricated by using low-cost inkjet printing technology. The designed antennas operate in the 1.5–2.5 GHz range and are suitable for diverse applications, including energy harvesting at WiFi and GSM bands. Suitable designs are fabricated by using silver-based inks in standard commercial printers. Despite the challenges in both design and fabrication processes, we demonstrate log-periodic antennas with desired operating properties at the target frequencies. Details of the design procedures, parametric analysis, as well as simulation and measurement results are presented.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115526040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/EMCT.2017.8090369
A. Altınoklu, Geokhan Karaova, Ö. Ergül
We present a novel multigrid approach for the shape optimizations of corrugated metallic sheets by using genetic algorithms (GAs) and the multilevel fast multipole algorithm (MLFMA). The overall mechanism is obtained by an efficient integration of GAs and MLFMA, while the optimizations are improved by applying multiple grids at different layers. We show that the multigrid approach provides more effective optimizations than the conventional no-grid optimizations that employ the discretization nodes directly. The multigrid optimizations become useful especially as the problem size grows and no-grid optimizations demonstrate poor performances.
{"title":"Shape optimizations of metallic sheets using a multigrid approach","authors":"A. Altınoklu, Geokhan Karaova, Ö. Ergül","doi":"10.1109/EMCT.2017.8090369","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090369","url":null,"abstract":"We present a novel multigrid approach for the shape optimizations of corrugated metallic sheets by using genetic algorithms (GAs) and the multilevel fast multipole algorithm (MLFMA). The overall mechanism is obtained by an efficient integration of GAs and MLFMA, while the optimizations are improved by applying multiple grids at different layers. We show that the multigrid approach provides more effective optimizations than the conventional no-grid optimizations that employ the discretization nodes directly. The multigrid optimizations become useful especially as the problem size grows and no-grid optimizations demonstrate poor performances.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"395 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131819016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/EMCT.2017.8090362
Bahadır Tektaş, Mohammed A. Salhi, O. Sen, S. Cakir, M. Çetintaş
Magnetic field immunity tests are performed in laboratories in Screen Chambers (SC) in accordance with the standard IEC/EN 61000-4-8 by using a 1 m × 1 m loop antenna. However, the EMC tests of the Equipment Under Test (EUT) sometimes cannot be carried out in laboratories due to several restrictions. In case of EUT with large dimensions, high power consumptions and/or auxiliary devices which are attached to EUTs, it is not possible to use laboratory facilities during tests. As a consequence, on-site magnetic field immunity tests are required in industry. For that reason adapted measuring methodologies and procedures are needed in industrial measurements. In this study, we experimentally investigated the uniform area of a self-made large loop antenna according to the relevant standard.
{"title":"Alternative magnetic field immunity test by using large loop antenna","authors":"Bahadır Tektaş, Mohammed A. Salhi, O. Sen, S. Cakir, M. Çetintaş","doi":"10.1109/EMCT.2017.8090362","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090362","url":null,"abstract":"Magnetic field immunity tests are performed in laboratories in Screen Chambers (SC) in accordance with the standard IEC/EN 61000-4-8 by using a 1 m × 1 m loop antenna. However, the EMC tests of the Equipment Under Test (EUT) sometimes cannot be carried out in laboratories due to several restrictions. In case of EUT with large dimensions, high power consumptions and/or auxiliary devices which are attached to EUTs, it is not possible to use laboratory facilities during tests. As a consequence, on-site magnetic field immunity tests are required in industry. For that reason adapted measuring methodologies and procedures are needed in industrial measurements. In this study, we experimentally investigated the uniform area of a self-made large loop antenna according to the relevant standard.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127291528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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